package com.software.lease.web.admin.service.impl;

import com.software.lease.common.minio.MinioProperties;
import com.software.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {


        //判断桶是否存在
        boolean bucketExists = minioClient.bucketExists(
                BucketExistsArgs
                .builder()
                .bucket(minioProperties.getBucketName())
                .build()
        );
        //如果不存在则创建桶
        if(!bucketExists){
            minioClient.makeBucket(
                    MakeBucketArgs
                            .builder()
                            .bucket(minioProperties.getBucketName())
                            .build()
            );
            //给桶赋予权限
            minioClient.setBucketPolicy(
                    SetBucketPolicyArgs
                            .builder()
                            .bucket(minioProperties.getBucketName())
                            .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                            .build()
            );
        }
        String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
                "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
        //上传文件
        minioClient.putObject(PutObjectArgs
                .builder()
                .bucket(minioProperties.getBucketName())
                .stream(file.getInputStream(),file.getSize(),-1)
                .object(filename)
                .contentType(file.getContentType())
                .build()
        );
        String url = String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),filename);
        return url;

    }
    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
